drop_index(7) [redhat man page]

DROP 
INDEX(7)							   SQL Commands 						     DROP INDEX(7)

NAME

       DROP INDEX - remove an index

SYNOPSIS

       DROP INDEX index_name [, ...] [ CASCADE | RESTRICT ]

   INPUTS
       index_name
	      The name (optionally schema-qualified) of an index to remove.

       CASCADE
	      Automatically drop objects that depend on the index.

       RESTRICT
	      Refuse to drop the index if there are any dependent objects.  This is the default.

   OUTPUTS
       DROP INDEX
	      The message returned if the command completes successfully.

       ERROR: index "index_name" does not exist
	      This message occurs if index_name is not an index in the database.

DESCRIPTION

       DROP INDEX drops an existing index from the database system. To execute this command you must be the owner of the index.

   NOTES
       DROP INDEX is a PostgreSQL language extension.

       Refer to CREATE INDEX [create_index(7)] for information on how to create indexes.

USAGE

       This command will remove the title_idx index:

	   DROP INDEX title_idx;

COMPATIBILITY

   SQL92
       SQL92  defines  commands by which to access a generic relational database.  Indexes are an implementation-dependent feature and hence there
       are no index-specific commands or definitions in the SQL92 language.

SQL - Language Statements					    2002-11-22							     DROP INDEX(7)

DROP 
INDEX(7)						  PostgreSQL 9.2.7 Documentation					     DROP INDEX(7)

NAME

       DROP_INDEX - remove an index

SYNOPSIS

       DROP INDEX [ CONCURRENTLY ] [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]

DESCRIPTION

       DROP INDEX drops an existing index from the database system. To execute this command you must be the owner of the index.

PARAMETERS

       CONCURRENTLY
	   Drop the index without locking out concurrent selects, inserts, updates, and deletes on the index's table. A normal DROP INDEX acquires
	   exclusive lock on the table, blocking other accesses until the index drop can be completed. With this option, the command instead waits
	   until conflicting transactions have completed.

	   There are several caveats to be aware of when using this option. Only one index name can be specified, and the CASCADE option is not
	   supported. (Thus, an index that supports a UNIQUE or PRIMARY KEY constraint cannot be dropped this way.) Also, regular DROP INDEX
	   commands can be performed within a transaction block, but DROP INDEX CONCURRENTLY cannot.

       IF EXISTS
	   Do not throw an error if the index does not exist. A notice is issued in this case.

       name
	   The name (optionally schema-qualified) of an index to remove.

       CASCADE
	   Automatically drop objects that depend on the index.

       RESTRICT
	   Refuse to drop the index if any objects depend on it. This is the default.

EXAMPLES

       This command will remove the index title_idx:

	   DROP INDEX title_idx;

COMPATIBILITY

       DROP INDEX is a PostgreSQL language extension. There are no provisions for indexes in the SQL standard.

SEE ALSO

       CREATE INDEX (CREATE_INDEX(7))

PostgreSQL 9.2.7						    2014-02-17							     DROP INDEX(7)